500 BULLETIN 186, UNITED STATES NATIONAL MUSEUM 



Thai specimens agree perfectly with an example from Laos, where 

 only laurentei is likely to occur. Lack of suitable material has, how- 

 ever, prevented me from verifying the putative distinctions between 

 laurentei and the Sikkimese pallidipes. 



CETTIA DIPHONE CANTURIANS (Swinhoc) 



Chinese Singing Bush Warbler 



Arundinax canturians Swinhoe, Ibis, 1860, p. 52 (Amoy, China). 



The only specimen yet known from Thailand is a male taken by my 

 collector at Chiang Saen Kao, January 15, 1937, but the species is likely 

 to occur in winter anywhere within our provinces. 



This large bush warbler is superficially very similar to Phraga- 

 maticola aedon rufescens, a much commoner bird. In winter, it has 

 the entire upperparts rufescent-brown, this color much intensified on 

 the forehead and crown; a poorly defined supercilium pale buff; an 

 indistinct transocular streak blackish brown; the underparts buffy, 

 paler (almost white) on the chin, throat, and center of the abdomen, 

 deeper along the flanks and on the under tail coverts (the slaty bases 

 of the feathers often showing through on the breast) ; the thighs mixed 

 brownish slate and ashy. The female is colored like the male but is 

 strikingly smaller. 



BRADYPTERUS THORACICUS PRZEVALSKII (Sushkin) 



Kansu Gray-breasted Bush Warbler 



[Dumetioola thoracica] przevalskii Sushkin, Proc. Boston Soc. Nat. Hist., vol. 38, 

 1925, pp. 41-42 ("Dshachar Mts., upper Hwang-no"). 



A female in complete prenuptial molt, collected by me on Phu Klia, 

 4,500 feet, April 5, 1936, may be placed provisionally with this form, 

 which is otherwise not recorded from Thailand. 



The bird was shot from a dense tangle of lalang and Rubus sp. at 

 an abandoned hai. 



It has the entire upperparts dark rufescent-brown; a narrow ashy 

 supercilium; the underparts ashy, fading to white on the chin and 

 abdomen and changing to rufescent-brown along the flanks, each 

 feather of the throat with a distinct blackish subapical spot ; the under 

 tail coverts rufescent-brown with broad white tips. 



This unique example does not match any one of a series of thirteen 

 from northwestern Yunnan and southwestern Szechwan (which may 

 be taken to represent thoracicus) but agrees well with my single 

 specimen from Sungpan, northwestern Szechwan (which is either 

 przevalskii or intermediate between przevalskii and thoracicus) . 



B. t. saturatus of Kwangsi has been separated from thoracicus on 

 grounds of lesser wing length and the former name possibly should be 



